Function returnAPIError

web/api/v1/api.go:751–773

(err error)

}

func returnAPIError(err error) *apiError {
	if err == nil {
		return nil
	}

	var eqc promql.ErrQueryCanceled
	var eqt promql.ErrQueryTimeout
	var es promql.ErrStorage
	switch {
	case errors.As(err, &eqc):
		return &apiError{errorCanceled, err}
	case errors.As(err, &eqt):
		return &apiError{errorTimeout, err}
	case errors.As(err, &es):
		return &apiError{errorInternal, err}
	}

	if errors.Is(err, context.Canceled) {
		return &apiError{errorCanceled, err}
	}

	return &apiError{errorExec, err}
}

func (api *API) labelNames(r *http.Request) apiFuncResult {
	limit, err := parseLimitParam(r.FormValue("limit"))